Cutter for defiberizing or shredding redwood bark, wood, and mill waste



Oct 13, 1931- c. H. BROWN ET AL CUTTER FOR DEFIBERIZING OR SHREDDING REDWOOD BARK, WOOD, AND MILL WASTE Filed Aug. 12, 1929 f? J f gjzvezz Ora Patented Oct. 13, 1931 CHARLES H.-.'BROW1\T Ann Junn UNITED f B'RdWN; 101i EuREKAQcAniFoRnIA CUTTER non DEFIBERIZING o3 snnnnnmojnnnwoon BARK, wo'on ,.A-1\Tn-MILL.wAsrE Application filed August 12, 1929Jseria1 no. 355,241. 5

McMillan Process Company, a corporation,

' under date of December 4, 1923. v

j An object of the invention is to provide a 15 cutter or apparatusfcapable of defiberizing or shredding redwood bark, wood, and mill waste longitudinally. 7

Another ob ect 1s to'provide a cutterso constructed that it shall be stableand rigid to withstand abnormal strain whichitends to bend or break them. j

' Another object is to provide a cutter that is highly eflicient. I

Another object is to provide a cutter with 5 v a maximum amount of cutting surface.

Another objectis to provide a cutter of] I n I j v p mportant factor in its favor' 'is ,-that after contmueduse, andthe cutting edge, as

scientific design, giving sufficient strength to the cutting. surface and body in directproportion to the length of cutter. 30 Another object is to provide a cutter consisting of a singleunit which may be manu- 1 factured at a slight cos-t. Y

Another object is to provide acutter which may be sharpened without removing same from machine. 7 I n Another object is to provide a cutter havm g a long life.

Another object is to provide a cutter which will produce a constant amount of material while in the process of wearing down.

Another obj ect'is to provide acutter which in their plurality arrangement can all. be jointed simultaneously and speedily while in the machine. i

apparent to persons who readathe following details of description in connection with the accompanying drawings. v

In the drawings illustratingthe principle 50 previously mentioned in comparison in this Other objects and advantages may become of this invention and'the best modenow knownto ourselvesof applying these princ ples; Figure lis an elevation showing the face-of the cutter while Figure 2showsthe ed r i l ve o F gure 3 s m l vlewas Figure 2except thatin Figure 3 the plurality-arrangement of the cutters isshowh. F gure 4 a view of the cutterinlperspective. Referring to the accompanying'drawings similar; numerals ;.rfer,to similar parts throughout the different figures... Figures 1, 2, and 4 showclearly the governing shapeof the i cutter which is made, of "high grade ma terlal to withstand theworkrand giye life to the machine of whichit is'a" Numeral 1, of Figures: 1, 2, and 'j4indicates the -;cutter c; at small or tapered end Itiis thi'sjiend wh ch comes in contact with th e bark or other woods, and accomplishes the desired; cutting efiect. The square. end of .thi'sicutt'er, rather than a roundedend running to a sharp point, 7i; mater ally increases the cutting surface, malt ingpossibl'eto-removea uniformlayer, leavmg no ridges to gover-burdenjhe following cutter. It also possesses much greaterdura.

.bility, and the cutting point or edge not easily broken down.

indicated by numeral 5 in Figure 3, which shows the relatlvearrangement of the cutters which is made up of several thousand cutters mounted in'rotation as shown by portion in Figure'8, that these cutters can easily and. quickly be jointed by'allowing them to come in contact with a jointing stone in reverse .motion. If the cutting edge or end, was rounded, and terminated in a sharp point, as O,

application it would necessitate. the dismantling of'the entire cylinder and sharpen each member individually. f

Numeral 2 shows in Figures land 4 the gradualtaper to the body part or shaft of the Q'ff cutter; This tape'redshape to the cutter allows sufiicientmaterial at various receding points to meet the strain as it is required on out to the cutting end itself. Asa result. of 99 '80 in plurality, does become worn and dull, that by reversing the rotation of the cylinder this construction breakage and bending have been reduced to a minimum. 7

The base of the cutter, numeral 3 of Figures 1, 2, and 4 terminates in a semi-circle following the line of curve of the punched hole, numeral 6, which is a fraction larger in diameter than the rod, 4 of Figure 3 on which the cutter is mounted.

This gives the cutter a positive anchorage,

and at the same time a loose mounting, allow.- ing the cutter to swing freely on the rod 4.

The part of the cutter shown by numeral 7 in Figures 1 and 4; consists of and is part of the body of the cutter. In punching the hole, 6, the rim or eyelet is left intact, the material strength of which has not been injured and breakage at this point is minimized. Also,

enough body has been left to allow that part sufiicient life against normal wear to equal other wearing parts of the cutter.

In Figure 3 which shows a small section of their plural arrangement on a multiple system of rods securely fastened to the cylinder, numeral 5 illustrates the uniform cut ting edge of maximum efficiency, which can only be obtained by the square cutting end.

Numeral 4c of Figure 3 shows the rod which passes through the eye of the cutter, numeral 6, and on through the lugs, numeral 8, which serve as means of securing the rods to the cylinder. Numeral 9 indicates the space left clear at the base of the cutter so the cutter will have an unobstructed path to swing freely upon the rod, numeral 4.

We claim: 1

A cutter of parallel faces, tapering sides, terminatin at the small end in a square like manner su stantially at right angles to the two faces, and the large end or base rounded off and equipped with a punched hole. for holding proper position when in use.

In testimony whereof we have hereunto set ourhands this 6th day of August, 1929.

CHARLES H. BROWN. JUDD A. BROWN. 

